Who's in the wrong for not wanting to pick up my younger sister from school?
This story has happened a while ago but i still remember it very well
For context i was 12 years old and my youngest sister was 6 years old, I have an older brother (he was 17 years old), my older sister (she was 13 years old) and my younger sister (she was 10 years old). We go to school with our driver since none of us has a license, and our father has passed away while our mother is a teacher and has to go to works early (she should be there before 7:30 AM), the driver's route is to drive the youngest to school then me and my sisters and finally drop my brother, and when the driver picks us up, he goes for our school first (me and my sisters) then my brother's and finally to the youngest.
My sister is 6 and has to be picked up from her class, so we agreed to make a schedule that everyday someone different has to pick her up, to stop fighting about who picks her up.
That day it was my brother's (he was sleeping and gets mad easily) and when we woke him up he got mad at us and said that he's not going to pick her up, after that we got in a fight and decided to call our mom, when she answered she told my older sister to pick her up, she refused, so the she said I should pick her up, I refused and told her that it isn't fair and it's not even my turn, she started yelling and saying that she won't help us and won't do anything good for us ever again, so even though I was angry angry, sleepy child and it was literally above 40° c I agrred and got out of the car to pick her up, the phone was in my hand and i forgot to hang up so when i got home she took my phone and slapped me a couple of time that my ears started ringing and told me she would kick me and my sisters (not my older and younger sister though) out of the house, by the way we have not eaten lunch yet and it had been more than 4 hours since we ate anything at school.
She told us that my older brother shouldn't even be on the schedule because he's a man, and that my younger sister shouldn't either because she's young, and that next time if we don't listen to her she would kick us for real (the house is my father's, and we inherited it with my mother, so legally she can't) she continued telling us that she could and will and didn't give me the phone for a month or so.
Now I know that my mother is wrong and shouldn't have hit me or yelled because it wasn't my fault (it is considered normal for parents to hit their children where I'm from so there is nothing i can do about that)
There are a lot of stories of my mom favouring my brother and I want to know about what i could do about it. (English isn't my first language so sorry for any mistake).